Multiple hammer



March 26, 1935. c. .1. ENDSLEY MULTIPLE HAMMER Filed Sept. 5, 1935 INVENTOR. 60/500 =f f I ATTORNEYS.

Patented Mar. 26, 1935 UNITED STATES PATENT'I' OFFICE-- j MULTIPLE HAMMER Colson JLEndsley, Los Angeles, Calif. I Application September 5, 1933, Serial na'sssgss 10 claims. (01. 255-41 This invention relates to an impact producing device or hammer which may eitherbe driven by a motor or be manually operated.

One object of the invention is to provide a de-.

5 vice of the character stated which will repeatedly strike blows of the desired force in a more effective manner, that is to say, if forexample the device, is manually operated the operator may more effectively apply his strength to-the production of a series of blows.

The invention may be advantageously used in a variety of situations, one of the-most efficient uses thereof being as a prospectors tool for operating a percussion drill by hand. Hitherto it has been necessary for prospectors to'drive their drills by means of sledge hammers which they grasp and operate by their handles, or else they have found it necessary to transport air-operated drills to the places where the prospecting was to be done. A prospector often finds it diflicult to transport any heavy appliance to the placewhere he is doing prospecting, which is often located in some mountainous district remote from means of transportation. Also he is usually not able to go to the expense of purchasing equipment of an expensive character. I I I By my invention a simple relatively inexpensive device is provided which is not so large or cumbersome as to make it impractical to transport it to the place ofuse; but which will nevertheless do the work in a much more effective manner than it could be doneby using the ordinary'hammer or sledge. I

When the invention is operated byhand the Workman will, nevertheless, be able to strike heavier and much more frequent blows than he could if he used a hammer which he operated in the usual manner.

The invention may be carried out invarious ways but in the embodiment illustrated in the drawing is shown as consisting of a rotatably mounted frame which carries a plurality of hammers, these hammers being arranged in pairs each pair consisting of two hammer elements which are arranged to counterbalance each other and said frame is provided with means for its continuous rotation thus causing the series of pairs of hammers carried thereby toone after another strike upon the tool to be driven.

Other objects, advantages and features of the invention may hereinafter appear.

Referring to the accompanying drawing which illustrates what is at present deemed to be a preferred embodiment of the invention,

Fig. 1 isa side view of the apparatus.

Fig. 1 is a view of the devicetaken at right angles to the showing in Fig. 1. In this view the upper and lower portions of the structure are broken away to contract the view, and portions are shown in section with other portions shown in elevation. The plane on which the sectional portions are taken is indicated by the line 2-2 on'Fig. 1. l I

Fig. 3 is an enlarged reproduction of a portion fFig.2. f I 7 Referring in detail to the drawing, the invention is shown mounted upon an upstanding bracket or standard which may bebolted to any suitable base member I 6. Said bracket supports a bearing '7 wherein is mounted a live spindle or shaft 8 portions of which project from said bearing as shown in Fig. 2. Toone of the projecting portions of said shaft is secured any preferred driving means 9 and to the other projectingportion thereof isjsecured the main rotatable frame or spider 10. I I 7 The frame 10 is provided with a plurality of radially extending arms 11 four of which are shown in the drawing. .Upon the extremities of each of these arms is mounted, in a rotatable relation to such arm, means 1 2 for supporting the paired hammers 13 and 14.; I I 3 I I Each hammer supporting means v12, by preference and as shown, consists of a cross bar which at its mid-length isprovided with a hub portion 15, said hub portion being furnishedwith a ball bearing 16 whereby it is rendered freely rotatable upon a stub shaft 17 carried by the arm 11. Said stub shaft 17 may consist of a bolt provided with a collar portion 18 which acts as a spacer between the hub and the arm 11. The bolt is shown having a threaded end portion upon which I is screwed a nut 19 thus clamping the end portion of the arm 11 between said collar and nut.

Each hammer element 13 or 14 is secured to the cross bar 12 in a slightly spaced relation to the extremity of the bar in order that such hammer element may not interfere with the hammer rebound checking device next to be described. This checking device consists of a slightly curved leaf spring 21 which is bolted to a corner portion of a frame 22. Said frame 22 has a web portion .23 whereby it supports four quadrilaterally arranged side portions 24. These side portions 24-. are of a concave character with their concave faces being directed outwardly to provide for the proper mounting of the springs 21. Frame 22 is shownsecured to frame 10 by cap screws 229:.

Each of the springs 21 is positioned so that its free end rests upon or nearly contacts with the outer face of one of these concave side portions, thus leaving a crescent shaped space between the spring and the side portion to which it is attached. In order automatically to release each spring 21 when it is desired to take its braking action off from the hammer supporting element, each of said springs is provided with a dog 25 which is fixed to a pivot shaft 259:. Each of these dogs normally bears against the convex side of a spring 21, being held in this position bymeansfiof a spring 26 which holds the arm 26a: of shaft 25a: against a stop pin 27. The bearing '7 is provided with a tripping pin 28 which is shown in Fig.1- as about to operate an arm 26a: and thus trip one of the dogs for the purpose of releasing one of the hammers l3.

In the operation of the device after the drill rod R has been positioned at the point Where the hole is to be drilled, the standardbiwhercon the device is mounted will be positioned in such a manner with relation to the drill'rod that one of the paired hammers can be brought squarely into contact with the upper end of the drill rod. After the device has thus been mounted the proper position the shaft 8 will be' manually or otherwise rotated to cause the mainframe torotate from right to left as viewed-in Fig 1 and as indicated by the downwardly directed arrow in the left hand portion of said vi'e'w, the' upwardly directed arrow farther to the left indicating the direction in which each hammer rebounds after the blow which it imparts" has been struck; As the main frame proceeds inits rotation, the paired hammers l3 and 14 shown in the left hand portion of Fig.1 pass through their dotted line positions indicated in saidviewand continue to gyrate in a clockwise manneruntil the hammer 14 occupies the position with relation to the main frame previously occupied by the hammer 13. The operation of the dog 25 by means of the pin 28 is so timed that the hammer 14 is arrested in its movement with relation to the main frame at the proper point.

Although, in the foregoing-description, it has been assumed that the standard which supports the device occupies an upstanding position-,and that the main frame rotates in a vertical plane, yet it is to be understood that the device maybe operated in such a position that the main frame is more or less inclined from the'vertical thus adapting it to strike blowsagainst a drill-rod which is inclined to any desired extent or it may even occupy a horizontal position.

1. In a device of the kind described; a support, a main frame mounted upon said support to rotate thereon, and a series of hammers carried by said frame and positioned to successivcly strike at a predetermined point when said frame is' rotated, said hammers being mounted in; pairs which are rigidly connected together by supports which are rotatably mounted upon said main frame, whereby said paired hammers are alternately brought into'operation;

2. In a device of thekind described, a'support, a frame rotatably mounted thereon, and a series of hammers carried in balanced pairs pivotally mounted on said frame and positioned successively to strike at a predetermined point when said frame is rotated.

3. In a device of the kind described, a frame, a support whereon said frame is rotatablymounted, a plurality of hammers pivotally' mounted upon said frame in circumferentially spaced relation to each other with regard to the plane of rotation of the frame, said hammers being positioned successively to strike at a predetermined point when the frame is rotated, said hammers being arranged in pairs, and means to check the rebound of each hammer and simultaneously bring the hammer with which it is paired into an operative position.

4. The subject matter of claim 3 and, the means for checking the rebound of each hammer consisting of a yielding brake member and means to automatically control the yielding movements of said brake member.

: =5. In a device of the kind described, a support, a frame rotatably mounted thereon, a series of hammers carried by said frame and positioned successively to strike at a predetermined point ,when said frame is rotated, and means for checking the rebound of each hammer, said means consisting of a yielding brake member and means to automatically control the yielding movements of said brake member.

6; In a device of the kind described, a support, a frame rotatably mounted upon said support, a series ofbars which at their mid-lengths are pivotally supported upon said frame, said bars having their pivots circumferentially arranged with relation to-the axis of rotation of said frame, a hammer carried by each end portion of the individual bars, each of saiddiammers counterbalancing the one which is paired therewith, and means automatically to cause said paired hammers to interchange striking positions when the device is operated. 7. In an impact producing device, a star-shaped rotatory support, a rotatory member on each point of the star, each member supporting a plurality of hammers in balanced relation to each other-,cachhammer being free to rebound upon striking thereby to start rotation of its supporting member, and means for checking such rotation to bring the next following hammer into striking position.

' 8. In an impact producing device, a star-shaped rotatory support, a rotatory member on each point of the star, each member supporting a plurality of hammer-sin balanced relation to each other, each hammer being free to rebound upon striking thereby to start rotation of its supporting member, means for checking such rotation to bring the next following hammer into striking position, and means for releasing the member from said checking means as the hammer reaches the point of impact.

In an impact producing device, a rotatory support, equidistant rotatory members on said support; a pluralityof hammers clamped on each member in balanced relation to each other, the impact of each striking hammer causing the hammer to rebound and thereby to start rotation of its supporting member, and means for arresting the rotation to bring the next following hammer into striking position.

10;In an impact producing device, a rotatory support, equidistant rotatory members on said support, a plurality of hammers on each member in balanced relation to each other, the impact of each striking hammer causing the hammer to rebound and thereby to start rotation of its support member, means for arresting the rotation to bring the next following hammer into striking position, and means engaging said rotation arresting means to release the member for rotation as said hammer reaches striking position.

COLSON J. ENDSLEY. 

